$\sin\left(b\right)\tan\left(b\right)+\cos\left(b\right)=\sec\left(b\right)$

$\int\:x\:cos\left(-2x\right)\:dx$

$b+b^3$

$\frac{x^2}{a}\cdot\frac{\left(1-x\right)}{a+1}$

$\int\left(\frac{x+22}{\left(x+7\right)\left(x-8\right)}\right)dx$

$4z^3-2z^3$

$\frac{dy}{dx}=5x^6y^2$